It was an incredibly hot day in London and this makes it very uncomfortable for the soldiers who wear thick wool uniforms and 2lb bear skin head dress. Up to five fell victim to heat stress and collapsed while standing in formation. Others can be seen ‘rocking’ back and forth on their heels as they try to keep their blood circulating.

An Army spokeswoman said: “We can confirm that during the Queen’s birthday parade today a small number of soldiers fainted.

“It is an extremely hot day and all were removed from the Parade and checked by medical staff where they were hydrated.”

Despite the heat the Soldiers performed the parade to perfection. Credit: PA

On the way to Horse Guards Parade from Buckingham Palace the Queen, accompanied with HRH The Duke of Edinburgh observed a minute silence to remember victims of GrenfellTower.

The Queen had earlier spoken of her pride at the country’s ability to be “resolute in the face of adversity”.

“During recent visits in Manchester and London, I have been profoundly struck by the immediate inclination of people throughout the country to offer comfort and support to those in desperate need,” she said.

“Put to the test, the United Kingdom has been resolute in the face of adversity.”

“United in our sadness, we are equally determined, without fear or favour, to support all those rebuilding lives so horribly affected by injury and loss.”